DIVERSITY OF LIFE

HIERARCHICAL CLASSIFICATION OF THE PHYLUM PRASINOPHYTA

EUKARYA>ARCHAEPLASTIDA>VIRIDIPLANTAE>CHLOROBIONTA>PRASINOPHYTA

This system is generally based on van den Hoek et al. (1995), but informed by the work of Melkonian (i.e. Melkonian 1989, 1990; Melkonian and Surek 1995; and Sym and Pienaar 1993).   

CLASS PRASINOPSIDA

The single class has the characters of the phylum.  It is divided into 5 orders. based on ultrastructure and characteristics of cell division (after van den Hoek et al. 1995).

ORDER MAMIELLALES.

Tiny unicells; 1-2 laterally-inserted flagella; 2 microtubular roots; one layer of scales over the cell in a pattern that resembles a spider's web.

Mamiella, Bathycoccus, Micromonas.

ORDER PSEUDOSCOURFELDIALES

Cells with 2 laterally-inserted unequal flagella with three flagellar roots; 2-3 layers of different body scales.

Nephroselmis.

ORDER PYRAMIMONADALES

Cell with a pit where 4-8 flagella are inserted; three layers of body scales; often with a lipid body.

Pyramimonas, Halosphaera, Pachysphaera, Pterosperma, Mesostigma, Dunaliella, Polyblepharides.

ORDER CHLORODENDRALES

Cells compressed; 4 flagella from an apical pit; body scales fused to form a theca.

Pedinomonas.

ORDER PRASINOCLADALES

Main form is a small multicellular benthic alga; reproduction by quadriflagellate zoospores.

Prasinocladus, Tetraselmis.

 

By Jack R. Holt.  Last revised: 03/19/2013